A force that acts when two forces rub together that slows or stops objects.
100
What are the three types of motion?
Straight line, curved, and back and forth (vibration).
100
What is force?
A push or pull that moves an object.
100
What is gravity?
A force that makes object pull towards each other (the earth).
200
On what surface will a ball travel the longest distance?
Tile floor, paved road, or grassy field
Why?
Tile floor, because it is the surface with the least amount of bumps (the smoothest).
200
Give an example of back and forth motion.
Vocal cords, plucking a guitar string.
200
A Pull goes ____________ from the body. A push goes
______________ from the body.
towards, away
200
What is a spring scale used to measure?
The amount of gravitational pull on objects.
200
Mrs. Forney and Mrs. Boxley's class are playing tug of war. What direction is the force exerted if Mrs. Forney and Ms. Boxley's team wins?
Towards Mrs. Forney and Mrs. Boxley's class.
300
In our friction experiment, which material had the greatest amount of friction? The least amount?
Carpet (most), foil (least)
300
What kind of motion is it when you pluck a guitar string? How did you know?
Back and forth (vibration). The string is moving back and forth creating vibrations, which causes the sound.
300
What happens when balanced forces are applied to an object?
Neither object moves
300
Force is measured using what unit?
Newton
300
How can you measure motion?
Speed
400
Which material has the LEAST amount of friction, wax paper or sandpaper?
Wax paper
400
Name the two types of motion that a race car driver would use when driving around a track?
Curved and straight line
400
What is a balanced force? What is an example?
When two things are being pulled in opposite directions with the same amount of force. (Tug a War).
400
What kinds of things would if there was no gravity on Earth?
Things would float, there would be no friction.
400
Stephen is building a Lego castle. He measures the mass of the parts before he builds the castle and measures the mass of the completed castle. How will the two measurements compare?
The two measurements will be the same.
500
Explain how you can tell if a surface would create a lot of friction.
A surface or material that has high bumps will cause a lot of friction.
500
How can you tell an object is in motion.
You can tell an object is motion by comparing objects that change position with objects that don't (relative motion).
500
How does an object's mass effect how my force is need tot move the object?
The more mass an object has the more force you will need to change the speed of motion.
500
Who is the scientist who explained how force and motion are linked?
Sir Issac Newton
500
What is velocity?
Velocity combines both the speed and direction an object is moving. Example, speeding up or slowing down changes the velocity of an object.